package plans

import (
	"fmt"

	"gitlink.org.cn/cloudream/common/utils/os2"
	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch/exec"
	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch/plan"
	"gitlink.org.cn/cloudream/jcs-pub/common/pkgs/ioswitch2/ops2"
	stgtypes "gitlink.org.cn/cloudream/jcs-pub/common/pkgs/storage/types"
	jcstypes "gitlink.org.cn/cloudream/jcs-pub/common/types"
)

func CompleteMultipart(blocks []jcstypes.ObjectBlock, blockSpaces []jcstypes.UserSpaceDetail, targetSpace jcstypes.UserSpaceDetail, shardInfoKey string, blder *exec.PlanBuilder) error {
	da := ops2.NewGraphNodeBuilder()

	sizes := make([]int64, len(blocks))
	for i, blk := range blocks {
		sizes[i] = blk.Size
	}
	joinNode := da.NewSegmentJoin(sizes)
	if err := setEnvBySpace(joinNode, &targetSpace); err != nil {
		return fmt.Errorf("set node env by user space: %w", err)
	}

	for i, blk := range blocks {
		gs := da.NewGetShardInfo(blockSpaces[i], blk.FileHash)
		gs.Env().ToEnvDriver(true)

		br := da.NewBaseReadDyn(nil, blockSpaces[i], stgtypes.DefaultOpen())
		if err := setEnvBySpace(br, &blockSpaces[i]); err != nil {
			return fmt.Errorf("set node env by user space: %w", err)
		}

		gs.FileInfoVar().ToSlot(br.FileInfoSlot())

		br.Output().ToSlot(joinNode.InputSlot(i))
	}

	// TODO 应该采取更合理的方式同时支持Parser和直接生成DAG
	br := da.NewBaseWrite(nil, targetSpace, stgtypes.MakeTempDirPath(&targetSpace, os2.GenerateRandomFileName(20)), stgtypes.WriteOption{})
	if err := setEnvBySpace(br, &targetSpace); err != nil {
		return fmt.Errorf("set node env by user space: %w", err)
	}

	as := da.NewStoreShard(targetSpace, shardInfoKey)
	as.Env().ToEnvDriver(true)

	joinNode.Joined().ToSlot(br.Input())

	if shardInfoKey != "" {
		store := da.NewStore()
		store.Env().ToEnvDriver(true)
		store.Store(shardInfoKey, as.ShardInfoVar().Var())
	}

	err := plan.Compile(da.Graph, blder)
	if err != nil {
		return err
	}

	return nil
}